Will 272/272 Cams Idle Different To 272/264

[GD51LA]

I'm in the market for hks 272 cams for my 26, I just love the angry idle

A pair of 272/264 came up, I just want to know if the 265 cam will make the idle less lumpy than a 272

[jet_r31]

well i hope they aint reverse staggered cams..f**k that

cheers

darren

[GD51LA]

What I mean?

[Blackkers]

yeah pretty likely. what turbo set up have you got to justify 272's?

[Piggaz]

How high are you revving to warrant 272's? It would want to be damn high!

If you want the "hectik" lump lump, pull some fuel and timing out at idle.

[GD51LA]

-5 (for now)

E85

Built engine

Street use only

I have tomei type b's ATM, and yes they will suit better for that setup, bit they idle a limitless mellow for my liking

If I pull fuel/timing at idle, this will give the idle I'm after?

Again, will 272/264 idle different to 272/272?

[KiwiRS4T]

Unbelievable

[scotty nm35]

If you want the "hectik" lump lump, pull some fuel and timing out at idle.

Or enable VCT at idle.

My cvt when actuated at idle sounds stupid lumpy.

[r32-25t]

Just fit them and and report back

[MJTru]

Ive been trying to know if my hks 272 cams will work for my drag setup. Im running a built motor and its for only drag racing but it seems like people are using the title "DRAG" as an excuse to answer if it will work or not. Im planning on running 10000rpms off the line. Will this be enough??? No one ever answered me in detail.

I wouldnt do this build for just the sound but I would choose to do it for that gain I would have according to the propose of the car. Which is only for drag racing max hp at WOT, and not for how it sounds at idle. Here is some photos of my setup. Oh the damper will be changed out thats just a mock up one. Details please guys

Edited June 9, 2014 by MJTru

[zebra]

272....with what lift?

doubt there is enough duration there to run 10k rpm without some serious porting

what are the ports like?

[MJTru]

Well I didnt really port it out. I just cleaned up the factory matching marks. I also took the hunp out tge exhaust ports. I have spring and retainers and valve to work with the cams. But ive always been asking for help with the cams. But obe one seems to want to help in deatail. Guess in the future ill just have to pay for the help. But I have already plan on swapping them out for oem one. I have lots of experience with those. Ill post photos of the ports

[GTSBoy]

Marcus, you are in the wrong thread.

And, yes, if you are planning 10k rpm and drag racing then yes you DO HAVE THE RIGHT CAMS (although as zebra points out you might even need more). We've already covered that.

OP, you have problems. If you want that idle, the cut one of your coil wires.

Edited June 9, 2014 by GTSBoy

[zebra]

well...you have given us nothing to go on

272 is the advertised duration

what is the duration at 0.050"?

what lift?

The motor has the factory intake...so not exactly designed around 10,000rpm

are the springs good enough for 10,000rpm?

are the springs good enough for 10,000rpm with a bucket load of boost being shoved down its throat?

[MJTru]

Damn I deleted the photos out my phone. But im after velocity thats why I never ooened up the ports. But choosed to just clean it up. What im doing is not a 100% drag as you woukd see the top end guys do it. I just street drag race. And as for the lift is close to stock lift. But I do know its 272 duration. Whicj is weird. I got these cams with the motor and couldn't finf the lift so I mesured them and its about 8.8 mm lift.

[MJTru]

Sorry if im in posting in the wrong place. GTSBoy. But it seems like when I was trying to find out everyone was away on vacation. I realy dont care to brake things learning. But by no means enjoy it this is why I try to learn by asking. I have never really build a full out race car in my class. As I do agree just doing it for the sound is insane. As for the intake not designed for 10k I can swallow that and im willing to change that. But isnt this forced induction and what and how much woukd the intake really matter. Please explain in detail and help not just me ecmveryone for that matter out. Our intuition will lead the way after that. As for the valve train I have listed part numbers of the springs and retainers as welm as asking if they will be adequate for my set up. Everyone was on vacation. What do you mean when you say. "Whats the duration at 0.050" im lost. How do I measure this. Cause I hate not know and understanding the setup. I shoukd just burn this car down before I even flipping try 10k.

[zebra]

Easiest way is not to target 10k rpm

get it on the dyno and find where peak power is

if It were my engine I'd rather jam both those cams in my ass instead of using them in the motor.

[MJTru]

Shit I was saying the same thing long time ago. But I kept getting "its drag racing of course it will work." I build around and knowing its not a real all out drag car. Its just what I intend to do with the car. Thats all. I dont even race the car on a real drag strip with track bite, all I do is illegal street drag racing to me its more fun. Kml. I will take those cams and put them up on display as for sticking them up my ass. Lol. Hell no. Lol. Do anyone want to buy hks 272 at 8.8mm lift. Lol

[Ben C34]

Maybe we need a hectic idle but not caring about performance thread!

And please. Don't stick cams in your bum.

[XKLABA]

Lift is volume, duration is overlap, both have different effects on engine and turbo charistics

Manual or auto ?

Capacity ?

Turbo?

Do you have a thread of your own ?